Description
Fastjson before 1.2.48 mishandles autoType because, when an @type key is in a JSON document, and the value of that key is the name of a Java class, there may be calls to certain public methods of that class. Depending on the behavior of those methods, there may be JNDI injection with an attacker-supplied payload located elsewhere in that JSON document. This was exploited in the wild in 2023 through 2025. NOTE: this issue exists because of an incomplete fix for CVE-2017-18349. Also, a later bypass is covered by CVE-2022-25845.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Alibaba Fastjson
Default version status: unaffected
0 to < 1.2.48affected
References
- https://github.com/alibaba/fastjson/compare/1.2.47...1.2.48 ↗
- https://www.seebug.org/vuldb/ssvid-98020 ↗
- https://www.cnvd.org.cn/flaw/show/CNVD-2019-22238 ↗
- https://www.freebuf.com/vuls/208339.html ↗
- https://github.com/vulhub/vulhub/tree/master/fastjson/1.2.47-rce ↗
- https://www.cloudsek.com/blog/androxgh0st-continues-exploitation-operators-compromise-a-us-university-for-hosting-c2-logger ↗
- https://cert.360.cn/warning/detail?id=7240aeab581c6dc2c9c5350756079955 ↗
- https://access.redhat.com/security/cve/CVE-2025-70974 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2428203 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-70974.json ↗